Question

13. Find the value of x in the following figures:
X + 20°


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Answer 1

Answer:

x+x+20=180

2x=160

x=80

Answer 2

Answer:

x = 80

x + 20 = 100

Step-by-step explanation:

We know that , the line OC in AB is in linear pair. So , the sum of these 2 angles is 180°.

⟶ x + x + 20 = 180 ( Linear Pair )

⟶ x + x + 20 = 180

⟶ 2 x + 20 = 180

⟶ 2x = 180 - 20

⟶ 2x = 160

⟶ x = 160 / 2

⟶ x = 80

∴ x = 80

Hence, The two angles are :

x = 80

x + 20 = 80 + 20 = 100

( 80 + 100 = 180° )

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